72977954 has 36 divisors (see below), whose sum is σ = 130374162. Its totient is φ = 30542400.

The previous prime is 72977951. The next prime is 72978001. The reversal of 72977954 is 45977927.

It can be written as a sum of positive squares in 3 ways, for example, as 69272329 + 3705625 = 8323^2 + 1925^2 .

It is a super-2 number, since 2×72977954² = 10651563540052232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72977951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 722504 + ... + 722604.

Almost surely, 2^72977954 is an apocalyptic number.

72977954 is a deficient number, since it is larger than the sum of its proper divisors (57396208).

72977954 is a wasteful number, since it uses less digits than its factorization.

72977954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 183 counting only the distinct ones).

The product of its digits is 1111320, while the sum is 50.

The square root of 72977954 is about 8542.7135033314. The cubic root of 72977954 is about 417.8918433876.

It can be divided in two parts, 7297 and 7954, that added together give a palindrome (15251).

The spelling of 72977954 in words is "seventy-two million, nine hundred seventy-seven thousand, nine hundred fifty-four".